Students test a variety of figures for symmetry by actually constructing reflections and rotations. The link to the tool itself is to a zip file that contains both the activity in pdf format and t...More: lessons, discussions, ratings, reviews,...

Investigate reflections, translations, glide reflections, dilations, rotations of 90, 180, 270 or any degree, and composition of reflections. Animations included on several pages. Usable at various ...More: lessons, discussions, ratings, reviews,...

Being able to visualize the movement of a shape is very important. The Flash movies on this webpage show a letter, or a polygon (after all, block letters are really just polygons), in their origina...More: lessons, discussions, ratings, reviews,...

A web page and interactive (Flash) applet demonstrating the reflection transformation. Drag the vertices of a triangle and re-position the line of reflection. The reflected image of the triangl...More: lessons, discussions, ratings, reviews,...

Practice transformations (reflection, rotation, and translation). Then try your hand at the game - figure out how to transform the shape to match the target shape. Reflections are over the x- and y-...More: lessons, discussions, ratings, reviews,...

This PowerPoint file displays questions about symmetry; answers guide the user to one of 17 symmetry classifications for tessellations or wallpaper patterns. Support materials include hands-on tessel...More: lessons, discussions, ratings, reviews,...

A Geometer's Sketchpad tool for constructing distorted images that can be viewed undistorted with a cylindrical mirror. The file contains tabbed pages with several images, a grid for students to draw...More: lessons, discussions, ratings, reviews,...

Students test a variety of figures for symmetry by actually constructing reflections and rotations. The link to the tool itself is to a zip file that contains both the sketch and a pdf file of the...More: lessons, discussions, ratings, reviews,...

Investigate reflections, translations, glide reflections, dilations, rotations of 90, 180, 270 or any degree, and composition of reflections. Animations included on several pages. Usable at various ...More: lessons, discussions, ratings, reviews,...

This is the junior version of Geom-e-Tree. It enables the manipulation of geometric trees with two or three branches. Change angle between branches and change common ratio. Selectable themes draw ...More: lessons, discussions, ratings, reviews,...

This material is based upon work supported by the
National Science Foundation under Grant DUE-0226284.
Any opinions, findings, and conclusions or recommendations
expressed in this material are those of the author(s)
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National Science Foundation.